Condensed Parent Company Only Financial Statements - Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
NET INCOME	$ 13,084	$ 9,351	$ 11,985	$ 12,749	$ 13,688	$ 11,458	$ 12,048	$ 9,986	$ 6,901	$ 5,099	$ 7,717	$ 7,828	$ 47,169	$ 47,180	$ 27,545
NET CASH PROVIDED BY OPERATING ACTIVITIES													67,342	51,762	40,301
NET CASH USED IN INVESTING ACTIVITIES													(303,928)	(101,918)	(272,360)
Dividends on common stock													7,194	5,598	5,513
Exercise of stock options															64
NET CASH PROVIDED BY FINANCING ACTIVITIES													199,803	119,503	250,904
(Decrease) increase in cash and cash equivalents													(36,783)	69,347	18,845
Cash and cash equivalents at beginning of period				123,592									123,592
Cash and cash equivalents at end of period	86,792				123,592								86,792	123,592
Parent Company
NET INCOME													47,169	47,180	27,545
Equity in undistributed income of the Bank													(17,644)	(36,065)	4,469
Other adjustments, net													(698)	(559)	(904)
NET CASH PROVIDED BY OPERATING ACTIVITIES													28,827	10,556	31,110
Investments in Bank subsidiaries													(8,024)		(20,463)
NET CASH USED IN INVESTING ACTIVITIES													(8,024)		(20,463)
Dividends on common stock													(7,194)	(5,598)	(5,513)
Exercise of stock options															64
Payments to acquire treasury stock													(5,838)	(8,341)	(5,771)
Repayments of long term debt															(3,000)
NET CASH PROVIDED BY FINANCING ACTIVITIES													(13,032)	(13,939)	(14,220)
(Decrease) increase in cash and cash equivalents													7,771	(3,383)	(3,573)
Cash and cash equivalents at beginning of period				$ 1,193				$ 4,576				$ 8,149	1,193	4,576	8,149
Cash and cash equivalents at end of period	$ 8,964				$ 1,193				$ 4,576				$ 8,964	$ 1,193	$ 4,576